USBasp - USB programmer for Atmel AVR controllers

USBasp is a USB in-circuit programmer for Atmel AVR controllers. It simply consists of an ATMega88 or an ATMega8 and a couple of passive components. The programmer uses a firmware-only USB driver, no special USB controller is needed.

Features

Works under multiple platforms. Linux, Mac OS X and Windows are tested.
No special controllers or smd components are needed.
Programming speed is up to 5kBytes/sec.
SCK option to support targets with low clock speed (< 1,5MHz).
Planned: serial interface to target (e.g. for debugging).

Download

Firmware and circuit

The following packages include circuit and firmware.
usbasp.2011-05-28.tar.gz (519 kB) TPI support (upcoming release of avrdude will use it), supports programmers with ATMega88 and ATMega8.
usbasp.2009-02-28.tar.gz (260 kB)
usbasp.2007-10-23.tar.gz (172 kB)
usbasp.2007-07-23.tar.gz (176 kB)
usbasp.2006-12-29.tar.gz (118 kB) Supports programmers with ATMega48 and ATMega8.
usbasp.2006-09-16.tar.gz (116 kB) New VID/PID!
usbasp.2005-11-14.tar.gz (175 kB)
usbasp.2005-07-03.tar.gz (166 kB)
usbasp.2005-04-21.tar.gz (169 kB)

Please refer to Readme.txt for details on building, installing and using USBasp.

Drivers

On Linux and MacOS X no kernel driver is needed. Windows requires a driver for USBasp:
usbasp-windriver.2011-05-28.zip (70 kB)

How to install USBasp drivers on Windows 8
Installing Usbasp Driver Software in Windows 8.1

Software

AVRDUDE supports USBasp since version 5.2.
BASCOM-AVR supports USBasp since version 1.11.9.6.
Khazama AVR Programmer is a Windows XP/Vista GUI application for USBasp and avrdude.
eXtreme Burner - AVR is a Windows GUI Software for USBasp based USB AVR programmers.

Hardware

Schematic

USBasp schematic

Partlist

Partnumber	Value	Reichelt No
C1	4,7u	RAD 4,7/35
C2	100n	X7R-5 100N
C3, C4	22p	KERKO 22P
D1, D2	3V6 zener	ZF 3,6
CON1	USB-B	USB BW
CON2	10pol	WSL 10W
IC1	ATmega8-16	ATMEGA 8-16 (not programmed!)
JP1, JP2	2pol 2,54mm	SL 1X36G 2,54
LED1	3mm LED green	LED 3MM 2MA GN
LED2	3mm LED red	LED 3MM 2MA RT
Q1	12Mhz	12,0000-HC49U-S
R1, R2	68	1/4W 68
R3	2,2k	1/4W 2,2k
R4, R5, R6, R7	270	1/4W 270
R8	10k	1/4W 10k
R9, R10	1k	1/4W 1k
M1, M2	Jumper	JUMPER 2,54GL SW
M3	Socket 28S	GS 28-S
M4	Case	TEKO 10007
M5	PCB	-

User PCB layouts

Here is a list of tested PCB layouts. If you have designed your own PCB, please let me know.

		usbasp_single_side.t3001.zip by Thomas Fischl Single-Side PCB, TARGET 3001! layout file Size: 90x40 mm (optimized for case Hammond 1591ATBU)
		lv_usbasp.tar.gz by Pawel Szramowski (11/2007) With Low-voltage front-end. Single-Side PCB, EAGLE layout files, some SMD components
		by Bernhard Walle Double-Side PCB, EAGLE layout files, part list with order numbers for Reichelt.de and Conrad.de Size: optimized for case Hammond 1591ATBU
		http://thomaspfeifer.net/atmel_usb_programmer.htm by Thomas Pfeifer Single-Side PCB, PDF layout files, SMD components
		by Tomasz Ostrowski Single-Side PCB, PDF and EPS layout files, only four 0805 SMD parts, rest discrete components
		USBasp_CH.zip by Christian Heigemeyr Single-Side PCB, with some SMD 0805 components, PDF-files With additional buttons for reset and disconnection of the target
		USBasp.sch, USBasp.pcb ComponentSide.pdf, TopSide.pdf, Schematics.pdf by Zhurov Pavel Single-Side PCB, P-CAD 2002 format and PDF files Crosspiece TXD and RXD are added for the ISP connector
		usbasp_gr.rar by J.A. de Groot The board is single sided (EAGLE format), measures 3 by 8 cm and uses only regular components.
		usbasb_mg.zip by Matthias Görner Single-Side PCB, eagle-format, with PS/PDF-files integrated sockets for target chips ATmega8 and ATmega32
		Tarball with layout by Hannes Östlund Doubleside-Side PCB, SMD components, very small
		by Sergiy Bogdancev (01/2010) 3.3V version, ATMega48 only. Single-side PCB, ExpressPCB layout format + socket board for varies AVRs. Without future serial interface, chip initially must be programmed with another programmer.
		Eaglefiles (sch/brd) and CAD case design (dxf) by Hans Hafner, HTL Mössingerstrasse-Klagenfurt, Österreich, hans.hafner (at) htl-klu (dot) at (01/2010) CNC-milled case (DXF file available), Eagle layout, only a few SMD parts
		Different USBasp versions: Easy to built non-smd, smd version and a very small USBasp by Sven Hedin (01/2011) Eagle files available.
		USB Key AVR Programmer by Fabio Baltieri (09/2011) Very small USB key like dimensions. SMD parts.
		AVR ISP Programmer by Jaroslav Vadel (04/2012) Small programmer. SMD parts.
		Target project and PDFs (layout/schematics) by Marius Schäfer (09/2013)
		tinyUSBboard with USBasp-compatible firmware by Stephan Bärwolf (04/2014)